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Preparation method of vanadium-titanium dioxide composite photocatalyst

A technology of titanium dioxide and composite light, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of complex preparation methods and limited photocatalytic performance, and achieve simple preparation methods and promote preferential orientation Effects of growth and photocatalytic activity improvement

Inactive Publication Date: 2018-04-24
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Preparation of TiO by Doping Transition Metal Ions 2 There have been many reports, but the preparation method of vanadium-doped titania by hydrothermal method is complicated and the photocatalytic performance is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of vanadium-titanium dioxide composite photocatalyst comprises the following steps:

[0020] (1) Dissolve titanyl sulfate and sodium metavanadate in deionized water, stir magnetically for 30 minutes, then add urea, stir magnetically for 30 minutes, then raise the temperature of the system to 50°C at a heating rate of 5°C / min, then keep warm for reaction 30min; wherein, the mass ratio of titanyl sulfate, sodium metavanadate, deionized water, and urea is 2:0.2:60:3;

[0021] (2) Under the condition of ultrasonic power of 300W and ultrasonic frequency of 40Hz, ultrasonically react for 30min, cool down to room temperature naturally, and then react with microwave for 10min under the condition of power of 200W;

[0022] (3) The product of step (2) was heated up to 140°C at a heating rate of 3°C / min, then reacted for 10 hours, cooled naturally to room temperature, and left to stand for 24 hours;

[0023] (4) Suction filter the product of step (3), wash ...

Embodiment 2

[0025] The preparation method of vanadium-titanium dioxide composite photocatalyst comprises the following steps:

[0026] (1) Dissolve titanyl sulfate and sodium metavanadate in deionized water, stir magnetically for 50 minutes, then add urea, stir magnetically for 30 minutes, then raise the temperature of the system to 50°C at a heating rate of 5°C / min, then keep warm for reaction 55min; wherein, the mass ratio of titanyl sulfate, sodium metavanadate, deionized water, and urea is 2:0.2:60:3;

[0027] (2) Under the conditions of ultrasonic power of 500W and ultrasonic frequency of 40Hz, ultrasonically react for 40min, cool to room temperature naturally, and then react with microwave for 10min under the condition of power of 200W;

[0028] (3) The product of step (2) was heated up to 150°C at a heating rate of 5°C / min, then reacted for 10 hours, cooled naturally to room temperature, and left to stand for 24 hours;

[0029] (4) Suction filter the product of step (3), wash the ...

Embodiment 3

[0031] The preparation method of vanadium-titanium dioxide composite photocatalyst comprises the following steps:

[0032] (1) Dissolve titanyl sulfate and sodium metavanadate in deionized water, stir magnetically for 40 minutes, then add urea, stir magnetically for 30 minutes, then raise the temperature of the system to 50°C at a heating rate of 5°C / min, then keep warm for reaction 45min; wherein, the mass ratio of titanyl sulfate, sodium metavanadate, deionized water, and urea is 2:0.2:60:3;

[0033] (2) Under the conditions of ultrasonic power of 400W and ultrasonic frequency of 40Hz, ultrasonic reaction was performed for 35 minutes, cooled naturally to room temperature, and then microwave reaction was performed for 10 minutes under the condition of power of 200W;

[0034] (3) The product of step (2) was heated up to 145°C at a heating rate of 4°C / min, then reacted for 10 hours, cooled naturally to room temperature, and left to stand for 24 hours;

[0035] (4) Suction filt...

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PUM

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Abstract

The invention discloses a preparation method of a vanadium-titanium dioxide composite photocatalyst. The preparation method of the vanadium-titanium dioxide composite photocatalyst comprises the following steps of (1) dissolving and magnetically stirring titanyl sulfate and sodium metavandate in deionized water, then adding and magnetically stirring urea in, and then increasing the system temperature to 50 DEG C for heat reaction; (2) performing ultrasonic reaction, naturally cooling down to room temperature, and then performing microwave reaction for 10 min; (3) increasing the temperature to140-150 DEG C for reaction for 10 h, naturally cooling down to room temperature and standing reaction products for 24 h; (4) performing suction filtration, washing filter residue through deionized water, drying the filter residue at 60 DEG C for 12 h, and then calcining the dried filter residue in a muffle furnace to obtain the vanadium-titanium dioxide composite photocatalyst. The method preparesthe vanadium-titanium dioxide composite photocatalyst through a hydrothermal method, thereby being simple in preparation, enabling the absorption band of titanium dioxide to red-shift towards visiblelight and further improving the utilization rate of visible light as well as photocatalytic activity.

Description

technical field [0001] The invention belongs to the field of photocatalyst preparation, and in particular relates to a preparation method of a vanadium-titanium dioxide composite photocatalyst. Background technique [0002] With the rapid development of industry and agriculture, various pollutants are discharged into clean water, causing serious water pollution, and water resources are currently facing a severe test. Therefore, sewage treatment is urgent. TiO 2 It has good chemical stability, corrosion resistance, non-toxicity, mild reaction conditions, insoluble in water, high catalytic efficiency and can completely oxidize pollutants to CO 2 and H 2 O and other advantages, so TiO 2 has been a research hotspot. However, its band gap is wide, it only responds to ultraviolet light, and electrons and holes are easily recombined, which is not conducive to photocatalytic reactions. [0003] A large number of studies have shown that transition metal ion doping is considere...

Claims

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Application Information

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IPC IPC(8): B01J23/22
CPCB01J23/22B01J37/08B01J37/343B01J37/346B01J35/39
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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